fflush function(Flush File Buffer) in C Language – example and detail

In the C Programming Language, the fflush function writes any unwritten data in stream’s buffer. If move is a null pointer, the fflush feature will flush all streams with unwritten statistics in the buffer.


The syntax for the fflush feature in the C Language is:

int fflush(FILE *stream);

Parameters or Arguments


The stream to flush.


The fflush function returns zero if successful or EOF if an error was encountered.

Required Header

In the C Language, the required header for the fflush characteristic is:

#include <stdio.h>

Applies To

In the C Language, the fflush characteristic can be used in the following versions:

ANSI/ISO 9899-1990

See Also

Other C functions that are noteworthy when dealing with the fflush function:

fclose characteristic setbuf characteristic setvbuf feature